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Chevrolet Cobalt Real World MPG

295 messages,  Last post on Nov 23, 2009 at 4:23 PM

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What is this discussion about? Chevrolet Cobalt, Fuel Efficiency (MPG), Coupe, Sedan

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#190 of 295 Re: [tokyo_goddess] by cmhj2000 Sep 20, 2008 (10:58 am)
Replying to: tokyo_goddess (Sep 20, 2008 10:03 am) So you really don't know. Rather than playing guessing games as I said, the reasons are vast. Try my original suggestion, then see what if any difference is made.   https://www.amsoil.com/storefront/api.aspx?zo=1473695   If anything it should be done once or twice a year anyway.
#191 of 295 Re: [tokyo_goddess] by okko1 Sep 25, 2008 (4:24 pm)
Replying to: tokyo_goddess (Sep 20, 2008 10:03 am) are you just using the dic for your mpg or are doing the math? the car should be getting near 30mpg. and is the car an automatic?
#192 of 295 by harrisblack Sep 25, 2008 (5:44 pm)
Maybe its the driver.
#193 of 295 Re: Why is my MPG decreasing? [tokyo_goddess] by tsjay Sep 25, 2008 (6:14 pm)
Replying to: tokyo_goddess (Sep 19, 2008 11:55 am) As someone else asked you, have you actually checked the gas mileage manually, or are you simply going by the indicated mileage on the DIC?   You should check the mileage manually before you do anything else.   If the car has really dropped to the kind of mileage you are seeing on the DIC, then it should be running rough, or it should have gotten extremely sluggish on acceleration, or both. If it seem to run as smooth as ever and has the same acceleration that it has always had, then I strongly suspect that you are getting a false low mileage reading on the DIC for some reason.   Check your mileage manually and let us know what you get, OK?   Oh, how many miles on the car, and what are your driving conditions? Have your driving conditions changed since the days when you were getting hight MPG?   Tom
#194 of 295 First oil change today by tsjay Sep 25, 2008 (6:27 pm)
Man, those are sure SMALL filters on the Ecotec engines, huh? I'm not sure I would feel very safe going more than 5K on those puppies. I had thought about switching to Mobil 1 at 10K miles and then going 10K between changes. If I did, I might want to change the filter at 5K.   I guess there might be just as much paper in these filters as in some of the small spin-ons. We just don't see how little paper is in the spin-ons, because of the can.   Tom
#195 of 295 28.2 MPG this time by tsjay Sep 26, 2008 (5:55 am)
The DIC was showing 29.1 MPG average for this tank of gas, but the manual calculation worked out to 28.2 MPG.   It looks like I am going to be able to count on getting 28.0 to 29.5 MPG on my normal mix of driving.   Considering that my mix is 15% to 20% in-town driving, and none of it is Interstate or Parkway driving, I am pretty happy with the mileage I am getting.   Tom
#196 of 295 2009 Cobalt 2.2 Engine by dispencer2 Sep 29, 2008 (2:06 pm)
On the first tank in town I averaged 23.2. I'll take it to Dallas in November -400 miles - and we can see what it does on the road. Replies to this message: tsjay (Sep 30, 2008 5:57 am) dispencer2 (Oct 01, 2008 3:54 pm) dispencer2 (Oct 01, 2008 4:00 pm)
#197 of 295 Re: 2009 Cobalt 2.2 Engine [dispencer2] by tsjay Sep 30, 2008 (5:57 am)
Replying to: dispencer2 (Sep 29, 2008 2:06 pm) I have never run out a tank of gas with all city driving, but that 23.2 doesn't sound too bad for all city. The EPA estimate is 22 MPG for city, right?   Are you happy with that mileage?   Tom Replies to this message: dispencer2 (Oct 01, 2008 3:54 pm) dispencer2 (Oct 01, 2008 4:00 pm)
#198 of 295 Re: Chevrolet Cobalt: Real World MPG [KarenS] by fillbackauto Oct 01, 2008 (12:45 pm)
Replying to: KarenS (Jun 07, 2006 8:31 am) link title
#199 of 295 Re: 2009 Cobalt 2.2 Engine [tsjay] by dispencer2 Oct 01, 2008 (3:54 pm)
Replying to: tsjay (Sep 30, 2008 5:57 am) I assume that it will improve when it gets broken in. Compared to a 1999 Century (17) and my 2003 DeVille (15) it is great. The best thing about the car (compared to Toyotas and other Japanese compacts) is the ride. I don't see much difference from the 2006 Impala I had. Obviously there is no comparison with the Cadillac but for a small car it rides very well. Toyotas are stiff and uncomfortable at least for me. The Yaris is horrible -the front seat doesn't go back far enough. The Chevrolet HHR isn't much better. Very small-feeling and cramped.

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